Cardiac Cycle and Conduction

Which letter is representing the cluster of cells that are autorhythmic, send the signal down the bundle branches and have a bpm of 20-40?

• A

• B

• C

• D

• E

Which letter is representing the Purkinje fibers which are the final area of signal transmission before the ventricles completely contract?

• A

• B

• C

• D

• E

A flap of tissue that prevents blood from flowing backward

• Aorta

• Atrium

• Septum

• Valve

What part of the electrical conduction system is labelled A?

• SA Node

• AV Node

• AV Bundle

• Bundle Branches

• Purkinje Fibers

What part of the hearts electrical conduction system "receives" the impulse from the nervous system telling it to contract?

• SA Node

• AV Node

• AV Bundle

• Purkinje Fibers

What is the first event of the cardiac cycle as described in the learning material?

• The ventricles contract

• The atria relax

• The entire heart relaxes

• The atria contract

The first natural "pacemaker" for the heart is known as the:

• Sinoatrial (SA) Node

• Purkinje Fibers

• Bundle of His

• Atrioventricular (AV) Node

What is the cardiac conduction system responsible for?

• being just another thing i have to learn in class

• providing the spark to initiate muscle contraction

• pushing blood through the circulatory system

• being a way for doctors to monitor heart rate

What is known as the "pacemaker of the heart"?

• AV valve

• AV node

• SA node

• Purkinje fibers

The node of the heart’s electrical conduction network found within between the atria and ventricles is known as the:

• sinoatrial node

• atrioventricular node

• bundle of His/atrioventricular bundle

• left and right bundle branches

• Purkinje fibers